* {
	font-family: 'Microsoft Yahei', sans-serif;
}

.navbar {
	margin-bottom: 0;
	border: 0;
	border-radius: 0;
}

.navbar-brand {
	padding: 7px 15px;
	height: auto;/*清除高度*/
}

.navbar-inverse {
	border: none;
}

.navbar-form {
	position: relative;
}

.navbar-form input {
	color: #eee;
	background-color: transparent;
}

.navbar-form  button {
	position: absolute;
	top: 50%;
	right: 20px;
	color: #9d9d9d;
	background: none;
	border: none;
	transform: translateY(-50%);
}

.banner {
	text-align: center;
	background-color: #2b80d9;
}
.banner .item>img{
	margin: auto;
}

.engine {
	padding: 80px 0 0;
	background-color: #fbfaf7;
}

.engine>.container {
	padding-bottom: 60px;
	background: url('../images/engine-bg.jpg') no-repeat right 60px;
	transition: background .75s;
}

.engine .container>h1 {
	margin-bottom: 35px;
	color: #0078d7;
	font-size: 48px;
	font-weight: bold;
}

.engine .container>h2 {
	margin-bottom: 80px;
	color: #666666;
	font-size: 30px;
}

.engine .engine-item {
	margin-bottom: 30px;
}

.engine .engine-item>.icon {
	position: relative;
	padding: 0 22% 22% 0;
	text-align: center;
	min-height: 1px;
	float: left;
}

.engine .engine-item>.icon::before {
	content: '';
	position: absolute;
	left: 0;
	top: 0;
	padding: 0 100% 100% 0;
	background-color: #0078d7;
	border-radius: 5px;
	display: block;
}

.engine .engine-item>.icon>img {
	position: absolute;
	top: 50%;
	left: 50%;
	height: 80%;
	transform: translate(-50%, -50%);
	z-index: 11;
}

.engine .engine-item>.details {
	margin-left: 4%;
	width: 74%;
	float: left;
}

.engine .engine-item h4 {
	margin-top: 0;
	font-size: 20px;
}

.engine .engine-item p {
	line-height: 1.8;
	color: #666666;
}

@media screen and (max-width: 768px) {
	.engine {
		padding-top: 30px;
	}
	.engine .container>h1 {
		font-size: 36px;
		text-align: center;
	}
	.engine .container>h2 {
		font-size: 20px;
		text-align: center;
	}
}

@media screen and (max-width: 992px) {
	.engine>.container {
		background: url('../images/engine-bg-s.png') no-repeat 50% 55px;
	}
}

@media screen and (min-width: 992px) {
	.container {
		width: 1000px;
	}
}

@media screen and (min-width: 1440px) {
	.container {
		width: 1170px;
	}
}